Eliezer specifically denied the possibility of a basilisk
Surely there's some non-zero possibility of acausal blackmail?
Well, I guess the standard caveat applies here: there's nothing that has really 0 chance of happening.
I don't know about, but if it turned out acausal blackmail was logically impossible, that would deserve a probability as small as we can allow ourselves.
WARNING: Memetic hazard.
http://www.slate.com/articles/technology/bitwise/2014/07/roko_s_basilisk_the_most_terrifying_thought_experiment_of_all_time.html?wpisrc=obnetwork
Is there anything we should do?